Elenco 30MHz Dual Trace - Manual (Page 49)

46
OPERATING INSTRUCTIONS
The portion of A is main sweep which is set by the MAIN TIMEBASE. The portion of B
is delay sweep witch is set by the DELAY TIME BASE. The mixed point C is
continuously variable by means of the DELAY TIME POSITION switch.
When turn the switch to DELAY position. A portion of Fig.5 disappears, the mixed
point C replaces the position of starting point and B portion of Fig 5 display only the
screen.
NOTE: DELAY TIMEBASE must be faster than MAIN TIMEBASE and not exceed 10
times.
X-Y OPERATION
X-Y operation permits the oscilloscope to perform many measurements not possible
with conventional sweep operation. The CRT display becomes an electronic graph
of two instantaneous voltages. The display may be a direct comparison of the two
voltages such as stereoscope display of stereo signal output. However, the X-Y
mode can be used to graph almost any dynamic characteristic if a transducer is used
to change the characteristic (frequency, temperature, velocity, etc.) into a voltage.
One common application is frequency response measurements, where the Y-axis
corresponds to signal amplitude and the X-axis corresponds to frequency.
1. Press the X-Y switch. In this mode, channel 1 becomes the X-axis input and
channel 2 becomes the Y-axis input. All VERTICAL MODE switch should be
disengaged for X-Y operation.
2. The X and Y positions are now adjusted using the X POSITION and the 2
POSITION controls respectively.
3. Adjust the amount of vertical (Y-axis) deflection with the CH 2 VOLTS/DIV and
VARIABLE controls.
4. Adjust the amount of horizontal (X-axis) deflection with the CH 1 VOLTS/DIV and
VARIABLE controls.
COMPONENT TEST
1. Press in COMP TEST pushbutton to place oscilloscope in component test
operating mode.
2. Disconnect CH 1 AND CH 2 input connectors.
3. Insert diode or zener diode, LED, capacitor, LED, capacitor, etc., between COMP
TEST socket and ground.
4. Verify that displayed waveform are similar to the Test Patterns shown in Fig.6.
5. When you have finished component testing, press COMP TEST pushbutton to
out position. This disables component test mode operation.